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Novel Ir(ppy) 3 Derivatives: Simple Structure Modification Toward Nearly 30% External Quantum Efficiency in Phosphorescent Organic Light‐Emitting Diodes
Author(s) -
Liu Di,
Deng Lijun,
Li Wei,
Yao Ruijuan,
Li Deli,
Wang Miao,
Zhang Shufen
Publication year - 2016
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201600020
Subject(s) - phosphorescence , iridium , oled , phosphor , quantum efficiency , phosphorescent organic light emitting diode , materials science , simple (philosophy) , doping , optoelectronics , diode , fluorescence , nanotechnology , physics , chemistry , organic chemistry , optics , catalysis , philosophy , epistemology , layer (electronics)
Novel tris‐cyclometalated iridium phosphors with diphenylamino groups and multiple fluorine atoms incorporated on cyclometalating ligands are developed for use as doped emitters in organic light‐emitting diodes (OLEDs). The green phosphorescent OLEDs based on heteroleptic iridium complexes exhibit an external quantum efficiency of 30% even using simple device structures, which is among the highest values ever reported for iridium phosphors.